Structure 13330 · Adams County, IA

US 34 over Metz Creek

Carries US 34 over Metz Creek, 2.3 Mi. W Of W Jct. Ia 25.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT52 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

52 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1921rebuilt 1959
Length52.2 ft15.9 m
Daily traffic2,390counted 2021
Last inspectedJune 2023every 24 months

Location

StateIowa
CountyAdams
Location2.3 Mi. W Of W Jct. Ia 25
CarriesUS 34
CrossesMetz Creek
Coordinates40.97897, -94.51320

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length52.2 ft (15.9 m)
Max Span49.9 ft (15.2 m)
Deck Width34.1 ft (10.4 m)
Deck Area165.4 sq m
Main Spans1
Year Built1921 (reconstructed 1959)

Traffic

Avg Daily Traffic2,390 (2021)
Truck Traffic24%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJune 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical7 — Countermeasures installed
Structure Number000000000013330

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

Nearby Bridges